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Si4430/31/32-B1
16
Rev 1.1
Figure 1. Si4430/31 RX/TX Direct-Tie Application Example
Figure 2. Si4432 Antenna Diversity Application Example
X1
30MHz
supply voltage
microcontroller
VDD
VSS
GP1
GP2
GP3
GP4
100n
C7
100p
C8
C1
L1
L3
L2
C6
C3
C2
1u
L1-L6 and C1-C5 values depend on frequency band, antenna
impedance, output power and supply voltage range.
Programmable load capacitors for X1 are integrated.
VDD_RF
SCLK
1
1
2
3
4
15
14
13    8
    1
SDI
SDO
VDD_D
RXn
TX
RFp
5
NC
NC
11
12
GP5
C9
1u
L5
C5
Si4430/31
C4
L4
L6
X1
30 MHz
Supply Voltage
Microcontroller
VDD
VSS
GP1
GP2
GP3
GP4
100 n
C7
100 p
C8
C1
L1
L3
L2
C6
C3
C2
1 u
L1L4 and C1C5 values depend on frequency band, antenna
impedance, output power, and supply voltage range.
Programmable load capacitors for X1 are integrated.
VDD_RF
SCLK
1
1
2
3
4
15
14
13
8
1
SDI
SDO
VDD_D
RXn
TX
RFp
5
NC
11
12
GP5
C9
1 u
L4
C4
C5
Si4432
TR & ANT-DIV
Switch
NC
1
3
2
6
4
5
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